| 摘要 |
PROBLEM TO BE SOLVED: To provide an air oil lubricating device for a ball bearing, capable of smoothly supplying lubricating oil and reducing machining man-hours while suppressing energy loss when supplying carrying air. SOLUTION: In the air oil lubricating device, an inclined portion 2b following a transfer face 2a is provided on the outer diameter face of an inner ring 2 of the ball bearing 1 and a nozzle member 6 is mounted in an outer ring spacer 10 adjacent to the ball bearing. The nozzle member has a gap forming face 6aa formed along the inclined portion of the inner ring at a gapδand a nozzle hole 8 opened in the gap forming face 6aa for discharging air oil. In the outer ring spacer, an air oil supply hole 9 is provided in communication with the base end of the nozzle hole. The nozzle hole consists of a nozzle hole inflow side portion 8a and a small-diameter nozzle hole discharge side portion 8b. The nozzle hole inflow side portion and the nozzle hole discharge side portion continue on the same straight line. A value for the ratio (nozzle hole diameterψn)/(ball diameterψb)of a nozzle hole diameterψn as the inner diameter of the nozzle hole discharge side portion to a ball diameterψb is 0.07-027. COPYRIGHT: (C)2007,JPO&INPIT
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